Modern day speakers of Indo-European languages, or descendants of the original speakers of Indo-European languages.

extinct: Anatolian · Paleo-Balkans (Dacian, Phrygian, Thracian) · Tocharian

historical: Anatolians (Hittites, Luwians) Celts (Galatians, Gauls) · Germanic tribes Illyrians · Indo-Iranians (Iranian tribes) Italic peoples · Thracians · Tocharians  

In anthropology, ethnology and sometimes linguistic anthropology, Indo-European people refers to the original people that historically spoke Indo-European languages, their ethnicity and their culture.

The Proto-Indo-Europeans a hypothetical group of people whose existence from around 4000 BCE and spoke Proto-Indo-European language.

Bronze Age (third to second millennia BC) speakers of Indo-European languages that had not yet split into the attested sub-families, viz.: early Centum and Satem dialects (speakers of languages predating Proto-Indo-Iranian, Proto-Armenian, Proto-Greek, Proto-Celtic, Proto-Italic, Proto-Germanic, Proto-Baltic, Proto-Slavic, and etc.)